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Field evaluation of a sound system to reduce estuarine fish intake rates at a power plant cooling water inlet
Maes, J.; Turnpenny, A.W.H.; Lambert, D.R.; Nedwell, J.R.; Parmentier, A.; Ollevier, F.P. (2004). Field evaluation of a sound system to reduce estuarine fish intake rates at a power plant cooling water inlet. J. Fish Biol. 64(4): 938-946. dx.doi.org/10.1111/j.1095-8649.2004.00360.x
Peer reviewed article  

Beschikbaar in  Auteurs 
    VLIZ: Open Repository 58966 [ OMA ]

Trefwoorden
    Aquatic organisms > Marine organisms > Fish > Marine fish
    Physics > Acoustics
    Properties > Water properties > Temperature > Water temperature > Surface temperature > Intake temperature
    Sound
    Water > Cooling water
    Clupea harengus Linnaeus, 1758 [WoRMS]; Lampetra fluviatilis (Linnaeus, 1758) [WoRMS]; Sprattus sprattus (Linnaeus, 1758) [WoRMS]
    België, Zeeschelde [Marine Regions]
    Marien
Author keywords
    acoustic fish deterrent; Clupea harengus; cooling water intake; low frequency sound

Auteurs  Top 
  • Maes, J., meer
  • Turnpenny, A.W.H.
  • Lambert, D.R.
  • Nedwell, J.R.
  • Parmentier, A.
  • Ollevier, F.P., meer

Abstract
    An acoustic deterrent system producing 20-600 Hz sound was used to repel estuarine fishes away from a power station cooling water inlet. During sound emission, total fish impingement decreased by 60%. The avoidance response varied among species from no effect to highly efficient deflection. Lampetra fluviatilis and Pleuronectiformes were less affected by the sound system while the deflection of clupeoid species was particularly effective. Average intake rates of Clupea harengus and Sprattus sprattus decreased by 94·7 and 87·9%, respectively. The results were explained as a function of species-specific differences in hearing ability and swimming performance. In general, species without swimbladders showed no or a moderate response while intake rates of species with accessory structures increasing the hearing abilities, such as a swimbladder or a functional connection between the swimbladder and the inner ear, were significantly reduced during test periods.

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